Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150239
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =83a(5) =332a(6) =1368a(7) =5795a(8) =25056a(9) =109728a(10) =487127a(11) =2183634a(12) =9876620a(13) =45013605a(14) =206392540a(15) =951751965a(16) =4410088770a(17) =20525178508a(18) =95902782437a(19) =449629623563
External references
- oeis: A150239